server {
    listen 80;
    server_name localhost; # This is fine as Traefik handles the external domain
    root /usr/share/nginx/html;

    # Specific location for the Decap CMS admin panel
    # This ensures that any request to /admin/ or /admin/* (that isn't an existing file/dir)
    # serves /admin/index.html, allowing Decap's client-side router to work.
    location /admin/ {
        try_files $uri $uri/ /admin/index.html;
    }

    # General location block for the rest of your site
    location / {
        index index.html; # Serves index.html from directories
        try_files $uri $uri/ =404; # Returns 404 if file/directory not found.
                                   # If your main site is also an SPA, change to: try_files $uri $uri/ /index.html;
    }

    # Optional: Deny access to hidden files like .htaccess or .git
    location ~ /\. {
        deny all;
    }
}